2.17 Describe the process of photosynthesis and understand its importance in the conversion of light energy to chemical energy

Photosynthesis is the process by which light energy is converted into chemical energy, typically by a plant. Carbon dioxide and water is made into glucose. Oxygen is a waste product of the reaction.

carbon dioxide + water → glucose + oxygen

Photosynthesis is the reverse of respiration, so plants use the waste products of other animals to create "food" for themselves. This allows them to live. Plants are at the bottom of the food chain, as they don't "eat" like animals do; they harness energy from the sun. Because of this, other animals eat them, which bigger animals eat, etc - it forms a food chain.

Here's a picture of a plant to make your day :)